Nut-lock.



No. 844,422. PATENTED FEB. 19, 1907.

A. L. STROUT.

NUT LOCK.

APPLICATION FILED 00120. 1906.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed October 20,1906. Serial No. 339.886.

To all whom it may concern/.-

Be it known that I, ARTHUR L. STRoUT, a citizen of the United States, residing at Bar Harbor, in the county of Hancock and State of Maine, have invented a certain new and useful Improvement in Nut-Locks, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in nut-locks and the object of my invention is to provide a nut-lock Whichisparticularly adapted to use with nuts of large size.

Nut-locks in which an integral lip or flap is bent from the edge of a washer to engage a side face of the nut are found not to work well when applied to nuts of large diameter,

known to me of applying that principle,'Fig-- ure 1 is an elevation showing one form of embodiment of my invention. Fig. 2 is a similar view, the flap being shown in plan view; and Fi .3 is an elevation showing the washer.

The olt a is provided with the usual head I) and shank c, the latter bein threaded, as shown in the drawings, and eing thereby adapted to engage the nut d. The threaded portion of the shank is formed'with a groove e, adapted to receive the tooth or prong f, which rojects inwardly from the wall of the central aperture g in the Washer h. At one of the edges of the washer there is hinged thereto a flap 6 through a hole j, in which there is passed a screw 70, which engages in one of the holes n, formed in the side faces of the nut.

It will be seen that the above construction obviates the bending (and thereby what is called the fatigue) 'of the metal of the washer. Moreover, a much closer fit is made possible between the flap of the washer and the face of the nut. This construction also serves, in connection with the means for lockingthe flap to the nut, to increase the security of the nut-lock.

I claim In a nut-lock, the combination of a bolt formed witha head at one end and with a threaded portion at its other end, said threaded portion being formed with a longitudinal groove; a polygonal-shaped nut the sidefaces of which are each formed with a threaded hole; a polygonal-shaped washer of the same size and having the same number of sides as said nut, said washer being interposed between said nut and head and bein formed with a tooth which projects into said groove; a flap hinged to one of the sides of said washer and adapted to lie flat upon one of the side faces of said nut, said flap being formed with a hole; and a screw which passes through the'hole in said flap and engages in one of the holes in the side faces of said nut.

In testimony whereof I hereunto set my hand, this 12th day of October, A. D. 1906, in the presence of two witnesses at said Bar Harbor.

. ARTHUR L. 'STROUT. Witnesses:

W. H. PARKER, LENA O. BENSON. 

